He had absolutely nothing to do, almost died of ennui, and became a confirmed misanthrope.

The only horrible thing in the world is ennui, Dorian.

…supped in an ivory manger with a jewel-frontleted horse; and, as Domitian, had wandered through a corridor lined with marble mirrors, looking round with haggard eyes for the reflection of the dagger that was to end his days, and sick with that ennui, that terrible taedium vitae, that comes on those to whom life denies nothing; and had peered through a clear emerald at the red shambles of the Circus, and then, in a litter of pearl and purple drawn by silver-shod mules, been carried…